Thomas jespeb-sen



I. JESPERSEN.

DEVICE FOR REMOVING PRINTERS INK FROM PRINTED MATTER.

APPLICATION HLED JULY I. I913- RENEWED APE T9, I919.

Patented July 29, 1919.

WITNESSE! ATTORNEYS the 'P'rinters Ink from UNITED STATES PA EN'fOFFICE.

THOMAS JESPEMEH, 01" N-Ellikfi. WISKT 'NBIN- DEVICE FOR REMOVING PR1)!TEES Lyell-nation flied July 1. 1918.

Be. it known that l. 'l'uoMAs Jusrnusus, a itizen of the United States.residing at Neenah. Winnebago eount v, State of Wismnsin. have inventedrertuin new and useful Improvements .in Deviees for Removing PrintedMatter, of which the following is u specification.

In removing printers ink paper and the like for the purpose o reclaiming the paper stiwk so as again to empluy it in the manufacture. ofpaper, it is usual to pulp the old printed paper in a heater engine as apreparatory step to the actual separation of the ink from the paper.Considerable diliieulty has been met with hitherto in ofl'eeting theactual removal of the ink from the pulped printed paper as abovereferred to when such ink has been prepared with mineral oil 0! oils.Such oils will not combine with alkalis so as tgr saponify, but. will,instead, rise to the surface. of the pulp.

The object. of my invention. nhout to he, descrihed, is to provide asimple. easily made and applied means capable of taking advantage ofthis tendency of the oil to rise so as to effect a eontinuonsly operatedand complete removal of the ink and oil from the pol The mventiou willhe better understand by referring to the aeeolnpanying drawing in whichFigure 1 represents a plan view of a. usual form of beat-er enginehaving a preferred form of the invention applied thereto; Fig. 2represents a ion itudinal vertieal section taken along the ine. 2, 2. ofFig. 1', and Fig. 3 shows a transverse seetion taken along the line. it,3. of Fig. l.

Hi lel-ring to the drawings, the heater engine may be of any usual typeeoinprising main t,rough l. the cylinder or re l 9, driven by gear. Ilthe bed plate, 4. and the niidt'eather. 5. As the roll revolves the pulpmixture, is eausod to rirrulute thereby around the ends of the.luidfeather (as indieated by the arrows) in the usual way. The arrangement and operation of the beater engine as described at". well known inthe art.

The particular ilnprm'e nent invented by me and constituting the subjectmatter of Specification of Letter: intent. aerial llo. 241.721. manna A-n in.

f rum printed this application is the srpur This comprises a 7. of woodor metal from the rear lhr lower edge of below trough, 6. or barrier,

tends across the lnain trough wall to the nudfeat-ln-r. the barrierdipping level edge to which likely to sink during operation of the enine.

the barrier, prefer-ah y, sho if not quite, to the top edge trough.

To the lower ed extending completely slightly the norlna INK FROMPBINT'ED MATTER.

the pulp Patented J My 29. E919.

ma. Serial No. 201.412.

ntilig devil-e or solid bullle Wall the lowest mixture is l or washingThe top edge of uld extend nearly, of the main 0 of the hallle and alsoacross the. main trough frommidfeather to wall. is attaehed a metalplate, inch 8. This plate is pet-fora holes spaced from "I to tmLsay byhr 1 inrh apar and is inrlined toward the oncoming pulp at an angle ofto the barrier.

about degrees The upper edge should lie on the same level as edge of thebarrier.

opens into the. llltlllliltlllfill wall between the 2' int-lies, and belower than the highest barrier and plate.

substantial diameter, say 2 to its top should not, level to which therise.

A flushing pipe disposed between of the separating ing the latter atshould extend from llll( trough.

11. am of water supply The outlet e. he provided with spared per \(Illl,its entire wall of the main vidod with a valve.

a suitable sourrr shown).

top and througl erubly, there should hea perforations and a row of pnlwith respect of this plate the upper An outlet pipe. J.

this pipe p mixture may be u is likely to 10, has its outlet end thebarrier and plate, 8,

device, preferably enterthe lnidfeather end;

Heather to the rear This pipe is prol eonnerts with lid of the each sidethereof so as to sweep s ace between the barrier and p ate above thesurface of the'pn when the water su in the operation ra ing devu-e, itbeing assunual is properly sup beater en i no water and printed paper.

rotate in the trough arrows and the oil the pa (not. npe shouldforations on its length: prefrentral row o perforations on the entirethe metal lp mixture s turned on. f my unproyed sepathat the plied withindu-atod by the ll rise to the surface,

a preferred form, various-changes in detail carrying with it the ink.'lhis oil and ink mixture will normally lic upon the surface as a thinfilm. l2, and will tend to be circulated about the trough with the pulp.As the pulp mixture travels about the trough its upper strata will firstmeet with the perforated plate, H. The perforations being small, thepulp will be unable to pass therethrough but will be forced down andaround the bottqni of the separating device as indicated at 13. The oilwith its contained ink, however, lyin as it does upon the to surface ofthe pn p mixture, and being lighter than the water, cannot be forceddown and under the bottom of the separating device, but will enter theperforations and be then obstructed by the barrier, 7. The effect ofthis will be, so to speak. to "pile up the oil against the inner side ofthe barrier. Pipe, 9, however, will draw this oil oil as fast as itenters the separating device.

In the normal operation of the engine upon the printed paper, as justdescribed, a certain percentage of the mixed or ombined oil and ink isconstantly being, converted into foam or froth. This, of course, willrise to the surface. Over and beyond this percentage I find that theamount of foam and froth will be very considerably increased by and atany obstruction met with by the circulating pul mixture. For thisreason, the operation of the en ine will c use a steadily increasingmass of oam and th to accumulate upon and at the outer surface of theperforated plate, 8. In time this accumulatlon will beso great that itwill be pushed over the top of the plate and into the separating devicebetween the plate and the barrier, .7. Further aceretions of foam andfroth will be produced within the separating device by reason of thefrictional resistance to the flow of the mixed oil and ink through theperforations. This aggro gated mass of foam and froth will obviously notreadily be drawn off by the outlet ipe, 9, but will instead tend tocling to t e metal plate, 8, and to the barrier, 7, and to hold the oiland ink particles entangled therewith. 'To avoid this dilliculty, I openthe valve, 11, every now and then and thus cause a spra of water toissue from the perforations in p pc 10 and tllllsjthol'oughly ush the searating device.

Instead 0 thus flushing out the sc arating device intermittently I may,if l choose, leave valve 11 and the foam and froth being washed away asrapidly as it is produced.

While I have described my invention in may be made within the s irit ofthe same and within the scope of tlie claims which follow. Thus theseparating device instead of being disposed between the midfcatherpermanently open so that the flushing operation is going on constantlyand the rear wall of the main trou b may be lo ated in any other desiredposition, the only essential being that it intercept the flow of thecirculating mixture.

Similarly as regards the separating device itself. Here the size andspacin of the perforation of the metal plate may fie varied n1accordance with the particular re airemcnts of the. particular work tobe don In some caseswire cloth or net of suitable mesh might besubstituted for the metal plate.

Furthermore, the se )arating device it self may be considerably modifiedas to its form. provided its essential features be retained. Thesefeatures I regard as, first, the barrier or some equivalent thereofplaced so as to intercept the circulatory flow of the oil and ink filmand pile it up so as to enable it to be more readily drawn OE, and,second, the perforated plate or strainer disposed so as to pass the oiland ink film but not the pol i'particles; the strainer should,preferably, a so placed that tho ulp particles will not adhere to itbut. will be passed on without, however. being able 1 get to thepiled-up oil and ink between the strainer and the barrier.

I may, therefore, substitute a pipe length for the separating deviceof'the drawin one end of the pipe being closed and t e other joined tothe outlet pipe, a side wall of the pipe through a certain arc, say 90to 150 approximately, being perforated or replaced by suitable wire net.

Still other variations will occur to those skilled in the art.

Having described my invention, I claim:

1. In a beater engine for washing pulped printed paper, a strainerdisposed to interccpt the upper strata of the circulating pulp 10Emixture so as to hold back the pulp particles, a barrier placed behindthe strainer to pile up the oil and ink film which has passed throughthe strainer and means for drawing oil the piled-up ink and oil.

2. la a heater engine for washing pnlped printed paper, a pcrforatedplate disposed to intercept the upper strata of the circulating pulpmixture said plate being inclined downwardly and forwardly with respectto 1 the direction of flow so as to deflect the held back pulpparticles, a barrier placed behind the strainer to pile up the oil andink film which has assed through the strainer, and means for rawing oilthe piled-up ink and 2 oil.

In a heater engine for washing pulped 'printed paper, a separatingdeyice. comprismg a barrier disposed across the upper part of the beatertrough to intercept the upper 125 strata of the circulating -pltlp andile up the ink and oil film, a perforated pate attached to the bottom ofthe barrier and em tending upwardly and forwardly therefrom toward theoncoming pulp so that pulp par 1 ticles will be deflected thereby andcaused to beneath the se aratin means for drawing 0 the pi? oil.

device, and ed-up ink and ,4. In a beater engine for washing pulpedprinted aper u. strai to the diieetien ner placed at an angle of motionof the circulating pulp mixture across the upper strata thereof so as tohold back and deflect the pulp particles, u barrier behind pile up thestrainer to 10 the oil and ink film which has passed throu h thestrainer, and means for drewthe piled up ink and oil. stimeny whereof Ihave hereunto set my hand.

THOMAS J ESPERSEN.

